WO1987000566A1

WO1987000566A1 - Securing of rails with a spring clamp

Info

Publication number: WO1987000566A1
Application number: PCT/EP1986/000433
Authority: WO
Original assignee: Vossloh-Werke Gmbh
Priority date: 1985-07-25
Filing date: 1986-07-23
Publication date: 1987-01-29
Also published as: DD249059A5; HUT43345A; HU195862B; ATE47172T1; EP0231304A1; SU1482536A3; DE3526653C2; LV15686D; MD435C2; GEP19960346B; LT2264B; DE3526653A1; EP0231304B1; DE3666242D1; ES2001395A6; LV5310A3

Abstract

Rails are fixed by a W-shaped steel spring clamp (9) made from bar steel, in which the central part passes round the shank of a square-headed bolt (11) anchored in a slot (10a, 10b) in the ribs (3a, 3b) of the sole plate (3); the free and closely-located ends (9a) of the clamp (9) exert a pressure on the rail foot (1a, 1b) and the pressure arms (9c) of the clamp (9) opposite the rail foot (1a, 1b) press on the outer side of the ribs (3a, 3b) of the sole plate. To enable pre-assembly, the free ends (9a') of the clamp (9') rest, in the pre-assembly position, on the upper surface of the ribs (3a, 3b) of the sole plate (3) in such a way that they provide a tight closure with the lower edge of the ribs and the two clamps of a support point form a rail-guide with their two free ends. In the assembly position, the free ends (9a) of the clamp (9) press on the rail foot (1a, 1b), by means of the square-headed bolt (11). The middle part (9e) is then located slightly above (a) the rail foot (1a, 1b) and the pressure arms (9c) opposite the rail foot rest on the outer side of the ribs (3a, 3b) and press on the sole-plate (3).

Description

Rail fastening by means of an elastic

tension clamp

The invention relates to a rail fastening by means of an elastic tension clamp made of steel bar in the form of a W, the central part of which wraps around the shaft of the hook screw anchored in a groove in the rib of the rib plate, the free ends of the tension clamp running against one another pressing onto the rail foot and the bracket parts of the tension clamp facing away from the rail base are supported on the outside of the rib of the rib plate. Such a rail fastening is described for example in DE-PS 1 261 151 (Meier). In the case of this known rail fastening, the base plate lies on the threshold with its guide ribs which are pulled up to the side of the rail. The rail is fastened by means of the sleeper screw, which presses eller with its screw head onto the elastic clamp made of steel bar. The bent ends of the clamp press on the rail foot, while the reversals of the clamp are supported against rotation on the base plate against its outer strips. The middle part of the clamp is arched up under the screw head and wraps around the screw shaft. When the screw is tightened, the middle part of the clamp is pressed down and, due to its central section resting on the rib of the base plate, is limited in the span of travel. This prevents the clamp from being overstressed and the base plate is screwed sufficiently firmly onto the threshold.

In contrast to the described prior art Kon¬ the rail constructive tion according to DE-PS 12 61 151 undergoes fastening according to DE-PS 19 54 008 their Spannwegbe¬ limitation is not on the rib of the ribbed plate, special - ^'which extends to the middle part of the tension clamp is to the area of the rail foot itself, where in the assembly position it lies either on the rail foot or on the free ends of the tension clamp or is located closely above it, so that the central part forms a direct or indirect hard-spring limit for lifting movements of the rail foot. This ensures that the bow-shaped clamp in their mounting position on the one hand presses down the rail with parts of the clamp over a long spring travel and on the other hand either by supporting these clamp parts against another hard resilient part of the clamp or when the one and the other clamp part jointly rest against the surface of the rail foot increased lifting force counteracting the rail and any tilting movement thereof over a short spring travel with increased holding force (cf. DE-PS 19 54 008, column 1, lines 45-56).

The rail fastenings described meet the requirements of modern railroad operations in their operating position (assembly position), i.e. the rail fastening is suitable for ensuring good fastening of the rail foot on the wooden sleeper, even at increased speeds and increased axle loads. As is known, the rails are moved more strongly in the vertical direction due to the increased axle loads, although lifting of the rail foot can occur despite the tensioning forces of the bow-shaped clamps acting on the rail foot. Even when cornering, there are increased stresses on the rail due to horizontal force components which seek to cause the rail to tilt.

In order to ensure an even more even contact pressure of the spring clamp on the rail base even over long spring travel, a rail fastening with an elastic clamp made of steel bar in the form of one has already been created, in which the reversals of the clamp facing away from the rail base no longer exist support on the ribbed plate, fischwiebend run approximately at the level of the surface of the rib of the rib plate. Such a rail fastening is shown in DE-PS 33 34 119 (Vossloh). The slim shape of the tension clamp according to this construction already allows an advantageous one for track construction

Pre-assembly. However, the anti-rotation lock required for assembly is no longer provided. In the first-mentioned construction according to DE-PS 1 261 151, such an anti-rotation device is only achieved by supporting the reversals on special strips arranged on the ribbed plates.

The object of the invention is therefore to create a rail fastening of the type mentioned at the outset with a non-rotatable pre-mountable tensioning clamp with rear support for use on ribbed plates. According to the invention, this aim is achieved with a rail fastening according to the preamble of patent claim 1, which is characterized by the features of the characterizing part of patent claim 1. Appropriate developments of such a rail fastening result from the subclaims.

This new rail fastening is characterized by a more stable position of the connection between the hook screw and the preassembled tension clamp against lateral impact forces acting on the tension screw, ie against forces acting in the longitudinal axis of the threshold, such as are common, for example, during loading and unloading or when laying on the track body or when inserting the rail during track construction. So can For example, with the tension clamp according to PS 33 34 119 (Alpha 1400) it cannot be avoided that due to the inclined position of the threaded bolt (hook screw) it springs back into the vertical position = or that the obliquely upright clamped clamping clamp is even slightly Vibration falls down from this unstable position and thus prevents the rail from being inserted. The more stable position in the new tension clamp is achieved in that the hook screw is pushed back vertically into the mushroom cut in the ribbed plate into the preassembly position.

The special design of the free spring arms of the new tension clamp, which in the preassembly position terminate with the inner edge of the rib, makes it easier for the two tension clamps opposite each other on the threshold with their two free arms to insert the rails. The rail threading is so considerably simplified compared to all previous methods that work such as the adjustment of sleepers is no longer necessary.

In the present application, the tension clamp with the hook screw is hammered in

In the direction of the rail web into the screwed position and then braced. Nothing has to be removed, turned or plugged in again.

The anti-rotation device is provided by the rear support of the tension clamp on the rib plate directly on the outer flank of the rib and additionally by contacting the free ends of the tension clamp on the inner flank of the rib. This ensures that during the transition from the pre-assembly to the assembly position, ie when the nut of the hook screw is tightened, the tensioning clamp cannot rotate in the direction of rotation and can thus assume an unfavorable position on the rail foot.

Further details of the rail fastening according to the invention are shown in the drawing. The drawing shows:

1 shows a cross section through a rail profile, in which the left side the rail fastening in the assembly position (tensioned position) in the outer track area

and the right side of the rail fastening in the pre-assembly position in the track interior in section;

Fig. 2 shows the top view of the rail fastening according to Fig. 1, i.e. the left side of Figure 2 in the assembly position and the right side in the pre-assembly position.

3 shows a plan view of the tension clamp of the rail fastening according to the invention;

Figure 4 is a side view of the tension clamp seen from the rail.

5 shows a section along the line V-V in Fig. 4.

6 is a perspective view of the tension clamp.

1 shows the rail fastening according to the invention in a view on the left half and in section on the right half. The left side shows the outside of the track in the assembly position and the right side shows the inside of the track in the preassembly position, the tensioning clamp being outside the outer edge of the rail foot 1b.

Figures 1 and 2 show the new rail fastening on wooden sleepers. The rail 1 is fastened to a wooden sleeper 4 by means of an elastic intermediate layer 2 between the ribs 3a and 3b of the ribbed plate 3. The rib plate 3 is fastened to the wooden sleeper 4 with four Sleeper screws 5, which clamp the ribbed plate 3 to the wooden sleeper 4 by means of high-tension spring washers 6.

The oblique position of the axis of symmetry 7 of the rail 1 prescribed by various railway administrations, e.g. 1:40, is achieved by a corresponding inclination of the surface of the rib plate between the ribs. In order not to make the ribbed plate 3 too heavy, a small step 8 is provided in the outside in a known manner.

In the installed position, the rail 1 is held down non-positively between the ribs 3a, 3b of the ribbed plate 3 in the region of the rail foot la, lb on both sides by means of the tension clamps 9. The tensioning clamp 9 is shown on the left-hand side of FIGS. 1 and 2 in the assembly position, the free ends 9a to be converged pressing on the rail foot la, while the middle part 9e lies in the assembly position with a small distance a above the rail foot la. The tensioning clamps are tensioned by means of the hook screws 11 anchored in the grooves 10a, 10b of the ribs 3a, 3b with nuts 12 and washers 13.

To simplify and reduce the cost of the track assembly, the ribbed plate 3 with the tensioning clamps 9 is already pre-assembled on the sleeper 4 in the position 9 'on the sleeper 4. The ribbed plate 3 is tightened on the sleeper 4 by means of the sleeper screws 5 and the tensioning clamp 9 is positioned in the position 9 'by means of the hook screw 11 of the nut 12 and the washer 13. It can be seen that the Tensioning clamp 9 'in this position is so inclined that the free arms 9a lie on the rib 3b and the middle part 9e in the unstressed state lie above and outside the free space of the rail.

In this position, the insertion of the rail 1 between the two ribs 3a, 3b is not hindered. The support legs 9c of the 'tensioning clamp 9 ^' facing away from the rail 1 are bent outwards and, in the top view which can be seen particularly well from FIG. 3, are shaped somewhat concavely outwards so that they can be supported on the heads of the sleeper screws 5 . The parts of the tension clamp 9 that wrap around the shaft of the hook screw 11, namely its central part 9e and the two lateral legs 9d, which have corresponding flats 14 in their parts that come into engagement with the washer 13, are also somewhat oblique in the preassembly position provided, wherein the hook bolt is somewhat laterally ver¬ and is only as far as slightly tightened in that the tensioning clamp in the pre-assembly position 9 ¹ aus¬ is just sufficiently fixed.

As can be seen from the views of FIGS. 3 and 4, the middle part 9e-9d of the tensioning clamp 9 is bent so far that the legs 9d run against one another up to a distance 15 which is less than the diameter of the shank of the hook screw - be 11. After the area of the closest approach of the two legs at the distance 15, they move away from each other again symmetrically to the center line VV, in order to then run downwards and merge into the support legs 9c, which are approximately parallel to the -1 0 -

Rail run, but are then bent upwards again and merge into the outer wings 9b, which finally open into the free ends 9a bent against the rail foot. The free. Ends 9a run approximately parallel to the legs 9c and to the rail foot.

The somewhat complicated spatial shape of the new tension clamp can be seen particularly well when FIGS. 3 and 4 are viewed together. As can be seen from FIG. 3, the ends 9a are shaped in such a way that when the tension clamp is pressed together it does not adhere to the head loop 9e, 9d come into contact. The spatial shape of the tension clamp 9 can be seen even better from the perspective illustration according to FIG. 6.

The shape of the tensioning clamp 9 also ensures that when the hook screw 11 is tightened it cannot rotate in the direction of rotation of the nut, because during tensioning and in the mounting position the outer support legs 9c and the free ends 9a are each on the outer flank or Support the inner flank of the ribs 3a, 3b of the rib plate 3.

The middle part 9e of the tensioning clamp is brought into the tensioning position by means of the hook screw 11 in such a way that it does not touch the rail foot 1a, 1b, but remains at a distance a. This ensures a soft spring characteristic. This is achieved by tightening the nut 12 on the hook screw 11 only to the extent that a small distance a remains between the middle part 9e and the rail base 1a or 1b. This distance ensures that the relatively hard spring characteristic of the middle part -1 1 -

9e of the tensioning clamp 9 only comes into effect when the rail foot is lifted up over a distance a, namely when the soft resilient ends 9a are raised to the height of the middle part 9e.

The pre-assembly position and the assembly position are characterized in that the surface of the ribs 3a, 3b of the fin plate does not come into contact with the different parts of the tensioning clamp 9. This surface of the ribs only serves as a support for the free ends 9a in the pre-assembly position 9 'of the tension clamp. When mounting, the correct positioning of the tension clamp is ensured by the outer and inner flanks of the ribs 3a, 3b of the ribbed plate 3.

When mounting, the flats 14 move from their inclined position shown on the right-hand side of FIG. 1 into the horizontal position under the washer 13. To accomplish the assembly, it is sufficient to push the hook screw 11 in the groove 10 slightly inwards and tighten the nut 12 until the middle part 9e is brought into the mounting position at a distance a above the rail base 1a, 1b. As already mentioned, the outwardly concave shape of the support legs 9c of the tensioning clamp 9, which can be seen particularly well from FIG. 3 and from the right-hand area of FIG. 2, allows it to be used particularly advantageously for the preassembly of the rail fastening according to the invention.

Claims

Claims:

1. Rail fastenings that can be preassembled on sleepers by means of an elastic tension clamp (9) made of steel bar in the form of a W, the middle part of which rests on the shaft of the hook screw (10) in a groove (10a, 10b. Of the rib (3a, 3b) of the ribbed plate (3)) 11), the free ends (9a) of the tensioning clamp (9) running in opposite directions in the assembly position press on the rail foot (la, lb) and the support legs (9c) facing away from the rail foot (la, lb) Clamp (9) on the

Support the outside of the rib (3a, 3b) of the rib plate (3) ^" , characterized in that the free ends (9a) of the tensioning clamp (9) in the preassembly position on the surface of the ribs (3a, 3b) of the rib plate (3) so rest that the free spring arms (9a ¹ ) with the inner edges of the ribs (3a, 3b) complete, whereby the two tension clamps (9 ¹ ) of a rail base form a rail entry with their free arms (9a ¹ ), while in the assembly position the free ends (9a) of the tension clamp (9) by means of the hook screw (11) press on the rail foot (la, -lb), whereby the middle part (9e) comes to lie at a small distance (a) above the rail foot (la, lb) and the support leg (9c) of the tension clamp opposite the rail foot at the

Place the outer flank of the rib (3a, 3b) and find its abutment on the rib plate (3)

2. Rail fastening according to claim 1, characterized in that in the preassembly position of the tensioning clamp, the hook screw in the mushroom milling of the ribs (3a, 3b) is offset vertically outwards.

3. Rail fastening according to claim 1 or 2, characterized in that the free ends (9a) and the support leg (9c) of the tension clamp (9) run approximately parallel to one another and their distance is chosen so that the free ends (9a ') and the support legs (9c) of the tensioning clamp (9) in the assembly position rest on the associated flanks of the ribs (3a, 3b) of the ribbed plate (3).

4. Rail fastening according to one of the claims 1 to 3, characterized in that the lateral legs (9d) and the outer wings (9b) of the tensioning clamp (9) are shaped such that the tensioning clamp covers the surface of the ribs ( 3a, 3b) of the ribbed plate (3) in the assembly position.

5. Rail fastening according to one of claims 1 to 4, characterized in that the rear support legs (9c) are shaped such that in the preassembly position of the tension clamp (9 '), the sleeper screws (5) are partially wrapped.

6. Rail fastening according to one of claims 1 to 5, characterized in that the head snare (11) encompassing the hook screw (11) from the central part (9e) and side legs (9d) flats (14) for interacting with the washer plate be (13) or the nut (12).

7. Rail fastening according to claim 6, characterized in that the side legs

(9d) after the formation of the head loop for receiving the shaft of the hook screw (11) approach one another to a distance which is ^" smaller than the diameter of the hook screw, so that the tension clamp (9) cannot be lost with the hook screw even in the preassembly position Cll) is connected.